Structure of cyanobacterial Photosystem I

Ingo Grotjohann, Petra Fromme

Research output: Contribution to journalReview articlepeer-review

142 Scopus citations


Photosystem I is one of the most fascinating membrane protein complexes for which a structure has been determined. It functions as a bio-solar energy converter, catalyzing one of the first steps of oxygenic photosynthesis. It captures the light of the sun by means of a large antenna system, consisting of chlorophylls and carotenoids, and transfers the energy to the center of the complex, driving the transmembrane electron transfer from plastoquinone to ferredoxin. Cyanobacterial Photosystem I is a trimer consisting of 36 proteins to which 381 cofactors are non-covalently attached. This review discusses the complex function of Photosystem I based on the structure of the complex at 2.5 Å resolution as well as spectroscopic and biochemical data.

Original languageEnglish (US)
Pages (from-to)51-72
Number of pages22
JournalPhotosynthesis research
Issue number1
StatePublished - Jul 2005


  • Antenna
  • Crystal structure
  • Electron transfer
  • Membrane protein
  • Photosynthesis
  • Photosystem I

ASJC Scopus subject areas

  • Biochemistry
  • Plant Science
  • Cell Biology


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